Eructation is the act of vomiting.<br> a. true<br> b. false

A particular species of fish were split by the formation of the Isthmus of Panama a long time ago. The fish developed changes in

Aloiza [94]

<span>This is speciation. In this process, two distinct species are formed through the intervention of some means such as differing environments or locations. This is done typically as a way of staying evolutionarily competitive in the area in which the species resides. The new species would be the exemplar of that which is best suited to the new conditions.</span>

5 0

3 years ago

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Suppose a population is carrying a condition controlled by two alleles: A (dominant) and a (recessive). Only homozygous individu

statuscvo [17]

Let a be Q, all which is homozygous recessive = Q∧2

A = p, AA which is homozygous recessive = Q∧2

2pq = heterozygous

It is derived from p+ q = 1

All those in a population which is Q = 20%

All A in the population (p) = 80%

Now that the disease is homozygous recessive therefore,

aa = qq or q × q = 0.20 × 2 = 4%

Then the answer is 4%.

5 0

3 years ago

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The simple interest on a loans of $200 at 10 percent interest per year is

inysia [295]

<h2>Simple Interest on a Loans - Option C</h2>

The simple interest on loans of $200 at 10 percent interest per year is $20 per year until the loan is paid off. Interest per year means the expense of interest that is charged for annum as a percentage of the value which is hired.

In order to calculate interest per year, multiply the principal basis for the rent by the interest per year then divide the value of interest per year by 12 (number of months in a year). Therefore, for simple interest on loans of 200 dollars at 10 percent interest per year, we calculate 20 dollars per year until the loan is paid off.

6 0

4 years ago

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The brilliant research scientist, Professor "Iron-Mike" Scrawll is studying a new pore-forming toxin from the pathogenic bacteri

Dafna11 [192]

Answer:

The correct option is C - Professor Scrawll applied 100 nM BurD to the cells for 24 hours, while Dr. Bogey applied 1 nM BurD to the cells for 12 hours.

Explanation:

The correct option is C - Professor Scrawll applied 100 nM BurD to the cells for 24 hours, while Dr. Bogey applied 1 nM BurD to the cells for 12 hours.

As the exotoxin, BurD is very stable and lyse the ankle cells very quickly, more concentration and more time of action should only lyse the cells. Perhaps Dr.Bogey's ankle cells were not lysed because the concentration she used was only 1nM compared to the 100nM concentration used by Dr. Scrawll, and the time period of incubation was only 12 hours compared to the 24 hours used by Dr. Scrawll.

Considering the other explanations given in the remaining options, the concentration and time of incubation used by Dr. Bogey are more than that used by Dr. Scrawll which should only have possibly lysed the cells. Moreover, contamination with bleach also should have only lysed the cells.

5 0

3 years ago

Explain the role of lipids, carbohydrates, and proteins in the cell membrane.

koban [17]

Lipids provide structure - allow the selective diffusion. Proteins provide structure - involved transport - involved in cell adhesion. Carbohydrates are involved in cell recognition - receptor complexes.

<h3>What is the function of lipids, carbohydrates, and proteins in the cell membrane?</h3>

The cell membrane is composed of a lipidic bilayer, cholesterol, proteins, and glucans incrusted in between.

⇒ Lipids

Phospholipids are amphipathic molecules.

They have hydrophilic heads facing the exterior and the interior of the cells and hydrophobic tails that arrange against each other in the interlayer space.

Lipids can easily change places with other lipids by lateral diffusion and transversal diffusion.

Their function is to provide structure to the membrane and allow the diffusion of some selected small molecules.

⇒ Cholesterol

These lipidic molecules play a significant role in membrane formation and structure. They are embedded in the membrane in between phospholipidic tails.

⇒ Carbohydrates

Carbohydrates are significant energy store molecules.

Carbohydrates get attached to lipids and proteins on the outer side of the membrane (glycolipids and glycoproteins).

Complexes protein-carbohydrate are used to identify and differentiate the cell and work as receptors.

Carbohydrates are also involved in cell adhesion.

⇒ Proteins

Among the proteins, we can find integral proteins and peripheric proteins.

Integral proteins are permanently associated with the membrane. They accomplish many different functions such as substances transport, cellular receptors, and cellular adhesion, among others.

According to how they are incrusted in the lipidic bilayer, integral proteins might be,

→ Transmembrane proteins ⇒ they cross the two lipid layers of the cell membrane.

→ Monotypic integral proteins ⇒ they can be found tied to one of the lipidic layers.

Integral proteins provide structure to the plasmatic membrane.

Periferic proteins are in the internal or external surface but not incrusted in the membrane.

In conlusion,

Phospholipids are the basic elements of the cell membrane. They are arranged in two layers, and thanks to their motion properties, they allow passive transport (diffusion) of some substances.

Proteins provide structure, are involved in facilitated and active transport, and are involved in cell adhesion.

Carbohydrates are involved in cell recognition and in receptor complexes.

You can learn more about membrane composition at

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7 0

2 years ago

Eructation is the act of vomiting. a. true b. false